James C. Greenwood (Born May 4, 1951) is a politician from the state of Pennsylvania.

Greenwood was born in Philadelphia, Pennsylvania and he graduated from Dickinson College. Greenwood was elected to the Pennsylvania house of representatives in 1980 as a Republican and the Pennsylvania state Senate in 1986. In 1992, Greenwood defeated Congressman Peter H. Kostmayer for a seat in the House of Representatives for Pennsylvania's 8th district. Greenwood's voting record has been moderate and he voted against two of the four impeachment charges against President Bill Clinton. He retired from politics in 2005, not running for reelection for an eighth term in the House in 2004.